Acid Spray

A blast of Acidic goo erupts from your hands. Each creature in a 60-foot cone must make a Constitution saving throw. A creature takes 8d4 Acid damage on a failed save, or half as much damage on a successful one. If they fail the saving throw they also take 4d4 acid every round until they spend and action to clean the acid of with water.

A creature killed by this spell becomes a melted puddle of goo

At Higher Levels. When you cast this spell using a spell slot of 6th level or higher, the damage increases by 1d4 for each slot level above 5th.